22101021202121 has 8 divisors (see below), whose sum is σ = 23401200049920. Its totient is φ = 20800855551808.

The previous prime is 22101021202103. The next prime is 22101021202163. The reversal of 22101021202121 is 12120212010122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22101021202121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22101021202121.

It is not an unprimeable number, because it can be changed into a prime (22101021202021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258020 + ... + 6653466.

It is an arithmetic number, because the mean of its divisors is an integer number (2925150006240).

Almost surely, 2^{22101021202121} is an apocalyptic number.

It is an amenable number.

22101021202121 is a deficient number, since it is larger than the sum of its proper divisors (1300178847799).

22101021202121 is a wasteful number, since it uses less digits than its factorization.

22101021202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6598743.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 22101021202121 its reverse (12120212010122), we get a palindrome (34221233212243).

The spelling of 22101021202121 in words is "twenty-two trillion, one hundred one billion, twenty-one million, two hundred two thousand, one hundred twenty-one".